Use default_serial_puts() instead of duplicating the implementation.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
        return readb(®s->data) & 0xFF;
 }
 
-static void arc_serial_puts(const char *s)
-{
-       while (*s)
-               arc_serial_putc(*s++);
-}
-
 static struct serial_device arc_serial_drv = {
        .name   = "arc_serial",
        .start  = arc_serial_init,
        .stop   = NULL,
        .setbrg = arc_serial_setbrg,
        .putc   = arc_serial_putc,
-       .puts   = arc_serial_puts,
+       .puts   = default_serial_puts,
        .getc   = arc_serial_getc,
        .tstc   = arc_serial_tstc,
 };